From 42c694c152f7f4fbee34d5e14be37d6e0d09673f Mon Sep 17 00:00:00 2001
From: pmacdona <>
Date: Tue, 23 Aug 2022 14:47:10 +0000
Subject: [PATCH] Fixes #95

FossilOrigin-Name: 384694dbb0d5f7f82657f9c5c9343ac4054661523627d7ba9cdd2faa8eac2b9c
---
 src/jsiEval.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/jsiEval.c b/src/jsiEval.c
index 45ef042..3ab20bb 100644
--- a/src/jsiEval.c
+++ b/src/jsiEval.c
@@ -1742,6 +1742,10 @@ Jsi_RC jsiEvalCodeSub(jsi_Pstate *ps, Jsi_OpCodes *opcodes,
             }
             case OP_TYPEOF: {
                 const char *typ;
+                if (fp->Sp<=0) {
+                    rc = Jsi_LogError("Invalid lookup/push");
+                    break;
+                }
                 Jsi_Value *v = _jsi_TOP;
                 if (v->vt == JSI_VT_VARIABLE) {
                     v = v->d.lval;